The invention provides a height fusion method suitable for an enhanced ground proximity alarm system, which is based on satellite height, radio height, corrected barometric altitude, barometric altitude signals and terrain height data of a high-precision digital map provided by an airborne avionics system. On the basis of precision evaluation of satellite height, radio height, corrected barometric altitude and barometric altitude, signal distortion or missing height is eliminated, and according to the flight stage of an aircraft, the weight of the height which is not eliminated is adjusted, so that the accuracy of the corrected barometric altitude is improved. The influence of the credible height data in the fusion height calculation process in different flight stages is improved, and finally the fusion height capable of accurately representing the ground proximity alarm height is obtained. According to the method, the flight height and the position relative to the ground of the aircraft can be more accurately positioned, the accuracy of forward-looking terrain avoidance warning is improved, and the false alarm rate is reduced; the situation that the foresight terrain avoidance warning function fails due to missing of single height data is reduced, and usability and robustness of a ground proximity warning product are enhanced.
提供一种适用于增强型近地告警系统的高度融合方法,基于机上航电系统提供的卫星高度、无线电高度、修正气压高度、气压高度信号和高精度数字地图的地形高度数据,在分别对卫星高度、无线电高度、修正气压高度和气压高度的精度评估的基础上,剔除信号失真或缺失的高度,并根据飞机的飞行阶段,通过调整未被剔除高度的权值大小,来提高不同飞行阶段下可信高度数据在融合高度计算过程中的影响力,最终得到可准确表征近地告警高度的融合高度。本发明能更为准确的定位飞机飞行高度和相对地面位置,提升了前视地形回避告警的准确性,降低了虚警率;降低了因单一高度数据缺失造成前视地形回避告警功能失效的情况,增强了近地告警产品的使用性和鲁棒性。
Highly fusion method suitable for enhanced ground proximity alarm system
适用于增强型近地告警系统的高度融合方法
2024-02-23
Patent
Electronic Resource
Chinese
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
Forward-looking prediction alarm implementation method of enhanced ground proximity alarm system
European Patent Office | 2022
|European Patent Office | 2023
|European Patent Office | 2017
|